ProSoft Technology 5202-DFNT-MCM4 User Manual
Page 51
Modbus Port Expander (4102/5102-MBS3-MBM)
MCM ♦ ProLinx Gateway
Driver Manual
Modbus Master/Slave
ProSoft Technology, Inc.
Page 51 of 80
October 16, 2009
7.2
[Modbus Slave Port x]
There are three slave ports on the Port Expander gateway. They all share the
same Slave ID, which is configured as part of the Master Port settings. These
three separate ports allow a single slave device (attached to the Master port) to
be connected on three separate physical Modbus serial networks and to be
polled by three separate Modbus Master devices.
7.2.1 Enabled
Y
ES
or N
O
This flag specifies if the port on the gateway will be utilized. If the parameter is
set to N
O
, the port will not be used. If the parameter is set to Y
ES
, the port will be
used.
7.2.2 RS
Interface
0 = RS-232
1 = RS-485
2 = RS-422
This parameter is used when Ports 1, 2, and 3 are present to configure the
electrical interface for these ports.
RS Interface selections for Port 0 are done with a jumper (electrical shunt) on the
back of the gateway.
7.2.3 Protocol
RTU
ASCII
This parameter specifies the Modbus protocol version to be used on the port.
Valid Protocols are RTU and ASCII.